Barrel-filter.



2 SHEETS-SHEET 1.

PATENTED OCT. 1 3, 1903.

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L. E. JOHNSON.

BARREL FILTER. APPLICATION FILED MAY 25, 1903.

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PATENTED OCT. 13, 1903.

A.E. JoHNsoN. BARREL FILTER. APPLIOATION` FILE1) MAY 25, 1903.

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UNITED STATES Patented October 1S, 190.

PATENT a OEEICE.

.BARRELiFILTEa sncrrrcazrlon forming pas; of Letters Patent No. 741,499, cated october 13, 1903.

Application led May 25, 1903- Serial No. 158,647. (No modell.)

To 1r/ZZ whom it may concern:

Beit known that I, ALFRED E. JOHNSON, a citizen of the United States of America, residing at Colorado Springs, in the county of El l tions containing the dissolved metallic values from the pulp or solid portion ofthe ore, as in the chlorination process.

My object is to provide an apparatus of this class which shall be capable of eifectively performing the filtration function and which shall be reliable, durable, and thoroughly practicable in operation g and to these ends the invention consists of the features, arrangements, and combinations hereinafter described and claimed, all of which will be fully understood by reference to the accompanying drawings, in which'is illustrated an embodiment thereof.

In the drawings, Figure 1 isa longitudinal section taken through'a barrel equipped with my improved filter. Fig.`2 is a section taken on the line 2 2, Fig. 1, and partly broken away at the top. Fig. 3 is a sectional view, partly in elevation, .showing one of the end members of my filter construction. The se'ctionized part of this view is taken 'on the line 3 3, Fig. 4.

Fig. 4 is a cross-section of afilter member, cutting the barrel in which the filter is 10.- cated. Figs. 3 and 4 are shown on a larger scale than Fig. 1. Fig. 5 is a sectional view in detail of a special construction of nut employed in my filter construction.

The same reference characters indicate the tallic values of the Ore under treatment. This barrel is also provided with end trunnions 7, a manhole 8, valvecontrolled inlets 9, and Valve-controlled loutlets 10. l

My improved filter construction, as shown inthe drawings, consists of a number of receptacles 12, arranged end to end longitudinally of 'the barrel andl perforated at the top and bottom, as shown at 12, to permit the entrance and escape of the solution. These receptacles or`boxes are composed of some material, as lead or an alloy of lead, adapted to resist the action of the chemicals employed in'dissolvingthe metallic values. They are illed'with somesuitable filtering substance,

as granular or othermaterial, 13, adapted' to-resist the action of the chlorin, acids, or other substances employed. This. ltering material is held in place'b'y a removable top plate 122 perforated as aforesaid. The side walls of these boxesv or receptacles extend Y below the perforated bottom 12d, as shown at 12g, leaving a central longitudinal channel 14 beneath the filter-bottom to allow the filter solution to flow freely to the outlets 10, which communicate with the said chan- `nel.A The side walls of the members 12 rest.

on the lead' lining of the" barrel. l The top plate 12c is securedto each filter Vmember and to the barrel by two metal studs 24, which are preferably secured to the body partof the member by being placed in the .mold when the said memberiscast or molded,l whereby sleeves 15' and 16, extending. upwardly and downwardly from the perforated bottom, are

formed andcompletely protect the metal stud from the action of the chemicals in the solution. These studs'have threaded extremities which protrude through openings formed in the barrel and the top plate of the filter member, and they are secured in place by nuts 17 'and 18. Thel nuts 17 are of ordinary construction, since they are located on the outside of the barrel and are not exposed to the action of 'the solution. The nuts 18 are of termediate metal part 18a, forming the nut proper, and an exterior part 180, molded around the metal part and composed of some material, as lead, adapted to protect the metal part of the nut from the action of the sointion in the barrel. The metal of the nut is .special construction and consist of an in- IOO therefore completely surrounded by the lead, except its interior threaded part, which engages the threads of the studs. To prevent the solutions from reaching the metal stud inside the barrel, Washers 19, composed of rubber or other suitable yielding material adapted to resist the action of the solution, are employed. Each stud is provided with three ot' these washers, one engaging the lead lining, another located underneath the top plate, and another on top of the said plate', thus fully protecting all of the joints, which otherwise would be exposed to the possible entrance of the corrosive liquid.

The lower edges of the side walls of the filter members are provided with V-shaped grooves 2O to permit the filtration of the solution in the barrel below the top of the filter. The outer end walls of each of the end members 12 of the filter extend below the perforated bottom of the member and rest on the lining of the barrel', as shown at 12, in the same manner as the side walls, to prevent the unfiltered solution from entering the channel 14 at these points. i

From the foregoing description the use and operation of my improved barrelfilter will be readily understood. After the filter is secured in place in the manner heretofore explained a suitable charge of ore, together with the necessary water and chemicals to produce the dissolving solution, is placed in the barrel, after which the latter is tightly closed and rotated a sufficient length of time to effect a dissolution of the metals which it is desired to save. The tank is then stopped,with the part containing the filter in the lowermost position. Water is then introduced under pressure by Way of one of the inlets 9 and the dissolved metallic values removed by filtration from the pulp or solid Inatter in the barrel. This solution passes through the top plate of the filter, through the filtering material below, thence out at the bottom into the channel 14:, and thence out of the barrel through theoutlets10,whose valves are opened for this purpose.

Having thus described my invention, what I claim is- 1. In a barrel-filter, the combination with a suitable barrel or cylinder, of a tilter having a perforated bottom, side walls extending below the bottom and engaging the barrel on the inside, filtering material resting on the bottom and confined by the side walls, a top perforated plate, and suitable means for securing the filter in place, a channel being formed underneath the bottom of the filter to receive the filtered liquid, the barrel being provided with a valved outlet in communication with the said channel.

2. In a barrel-filter, the combination with a suitable barrel or cylinder,of a box perforated at the top and bottom and containing a suitable filtering substance, the side walls of the box extending below the bottom and engagingthe barrel on the inside, leaving a channel underneath the filter,to receive the filtered solution, the channel being closed against the entrance of solid material in the barrel and in communication with a suitable valvecon trolled outlet with which the barrel is equipped, and suitable means for securing the filter in place within the barrel.

3. A barrel-filter composed of a box having side walls engaging the inner surface of the barrel or lining, a perforated bottom above the bottom of the side walls, a perforated top plate, filtering material located and confined between the two perforated parts, and suitable means for securing the filter in place.

4. A barrel-filter composed of a box perforated at the top and bottom and having a filtering substance interposed and conned between the two perforated parts, the top being detachable and the side Walls extending below the perforated bottom to form a channel underneath for the filtered liquid, and suitable means for securing the top plate in place and the filter in position in the barrel.

5. A barrel-filter composed of a box perforated at the top and bottom and provided with an interposed filling of filtering material, the outer walls of the box extending below the bottom and forming a channel for the entrance of the ltered solution, the said box being composed of material adapted to resist the corrosive action of the contained solution.

6. The combination with a suitable barrel or cylinder, of a lter composed of members arranged end to end lengthwise of the barrel, each member being perforated at the top and bottom and provided with an interposed filling of filtering material, the side walls of each member extending below the perforated bottom to form a channel for the entrance of the filtered solution, the end walls of the end members extending below the bottom to close this channel at the ends, the said channel being in communication with the outlet with which the barrel is provided, and suitable means' for securing the filter members iu place.

7. A barrel-filter consisting of a box composed of material adapted to resist the cor rosive action of the contained solution, the said box having a perforated bottom raised above the lower edges of the side walls to form a channel underneath for the entrance of the filtered solution, and a detachable, perforated top plate for holding the filtering material in place, studs passing through the box and through the wall of the barrel, and nuts applied to the studs for holding the filter in place, the inner nut and the stud where it passes through the box, being protected against the corrosive action of the liquid.

8. The combination with a suitable barrel or cylinder, of a filter composed of a plurality of filter members arranged end to end lengthwise of the barrel, each member being composed of material as lead, adapted to resist the corrosive action of the liquid, and each member consisting of a box-like receptacle tio having a perforated bottom and a detachable perforated top plate, the walls extending be-v low the bottom to form a channel underneath for the entrance of the filtered liquid, studs passing through the filter members which vare provided with protecting-sleeves sur-` rounding the studs, the said studs also passing through the wall of the barrel, and nuts applied to the threaded extremities of the studs, the inner nut consisting of an inner metal part surrounded by material adapted to resist corrosive action.

9. The combination with a suitable receptacle, of a filter having a perforated bottom, 

